Independent Review · Updated June 2026

3 Ton 16 SEER 96% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow

High-efficiency dual-fuel system with 96% AFUE and 16 SEER for serious savings

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
3 Ton 16 SEER 96% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow
Current Price
$0
Check Price at HVACDirect → Shop Now at HVACDirect
Authorized dealer · Full manufacturer warranty
// Bottom Line
This Goodman system excels for homeowners seeking maximum heating efficiency with solid cooling performance in mixed climates. The 96% AFUE furnace and 16 SEER condenser make it ideal for areas with moderate heating and cooling seasons where fuel costs matter.

Review

Goodman's dual-fuel system represents a practical middle ground for contractors seeking balanced heating and cooling capability. This downflow configuration handles both natural gas and propane, offering installation flexibility across residential markets. At 100,000 BTU heating capacity paired with 34,800 BTU cooling output, it addresses the mismatch many homeowners face between heating needs and cooling demands. The ENERGY STAR certification signals genuine efficiency credentials, not just marketing claims.

The 96% AFUE furnace efficiency rating places this firmly in the high-efficiency category, meaning homeowners lose only 4% of fuel energy up the flue. Cooling performance comes in at 16 SEER1 using R410A refrigerant in a scroll compressor configuration. The variable-speed ECM motor tops out at 2,000 CFM and operates at 73.5 dB, delivering quieter operation than many single-stage competitors. Two-stage burner control reduces cycling losses during mild weather, though the single-stage compressor limits similar cooling benefits.

Pros & Cons

Pros

  • 96% AFUE furnace efficiency captures 96 cents of every heating dollar, well above standard 80-90% models
  • 16 SEER cooling rating qualifies for ENERGY STAR, reducing summer electricity consumption significantly
  • Two-stage burner and variable-speed ECM blower motor provide quiet, even heating and cooling at 73.5 dB
  • Flexible fuel compatibility with natural gas or propane accommodates various regional utility situations
  • PVC exhaust requirement simplifies venting compared to metal flue alternatives on many installations

Cons

  • Single-stage compressor limits part-load efficiency compared to two-stage models, affecting performance on mild days
  • 30-amp breaker maximum limits placement options in some older electrical panels with limited capacity
  • Spec sheet lists conflicting tonnage information, showing both 3-ton and 5-ton ratings that need clarification

Who Should Buy

Best For

Contractors and homeowners in heating-dominant climates who run furnaces 6-8 months yearly and want to minimize natural gas bills. This system makes financial sense in northern regions where high AFUE efficiency pays back through lower heating costs within 5-7 years.

Consider Alternatives If

Buyers in hot climates prioritizing cooling efficiency should explore 16-17 SEER two-stage systems, and those with panel space constraints under 20 amps should verify electrical feasibility first.

3 Ton 16 SEER 96% AFUE 100,000 BTU Goodman Gas Fur
$0
Buy at HVACDirect →

Installation

Downflow/horizontal configuration suits basements, crawlspaces, and attic installations where ductwork runs downward. PVC plastic exhaust venting simplifies routing and reduces condensation issues common with metal flues. Standard 3/8-inch liquid and 7/8-inch suction line sizes match typical residential refrigerant piping. Technicians need 115V single-phase 60Hz power with 18.7 to 30-amp breaker capacity. Most installations complete in 4-6 hours for experienced crews.

Warranty & Reliability

Ten-year parts warranty activates upon online registration, covering compressor, heat exchanger, and major components. This represents average coverage for mid-tier residential equipment. Goodman evaporator coil carries separate warranty protection. Registration requirement means contractor or homeowner must complete paperwork promptly to avoid coverage gaps. Typical labor warranty runs separately and varies by installer.

Specifications

SKULS38783850
Brand/ManufacturerOnline Supply
Cooling BTU34,800
Heating BTU100,000
RefrigerantR410A or R22
Electrical115 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)73.5
Weight (in lbs)30.000000
FeatureSpec
Energy StarYes
SEER1 (Efficiency)16
Condenser StagesSingle Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size7/8"
Max Breaker Size30 amps
Min. Breaker Size18.7 amps
Tonnage5 Ton
Height30"
Width21"
Depth21"
ResourcesCAPF Installation Manual CAPF Specifications Sheet Goodman Evaporator Coil Warranty You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING This product and many products on our site may contain a chemical know to the state of California to cause cancer or birth defects or other reproductive harm. For more information about Proposition 65 please Click Here.
AHRI Certificate Number7368844
Airflow DirectionDownflow/Horizontal
Exhaust Flue RequirementPlastic / PVC
Product FeaturesRebate Available
Furnace Efficiency / AFUE96%
Blower MotorVariable Speed - ECM
Maximum CFM2000
ConfigurationUpflow / Downflow
Burner StagesTwo
Fuel TypePropane, Natural Gas
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil
Suction Line Insulation Thickness3/4"
Length50 feet

Frequently Asked Questions

Why does the spec sheet show both 3-ton and 5-ton ratings? +
This appears to be a data entry error in the product specifications. The cooling BTU of 34,800 aligns with 3-ton capacity, while heating at 100,000 BTU suggests a larger unit. Verify with the manufacturer or seller before purchase to confirm actual tonnage and ensure proper sizing for your home.
Can I use this system with my existing ductwork? +
If your current system uses similar 7/8-inch suction and 3/8-inch liquid lines with downflow configuration, integration is straightforward. However, mixing old and new refrigerant lines requires pressure testing and proper evacuation. Hire an EPA-certified technician to assess compatibility and perform the changeover correctly.
How much can I save on heating costs with 96% AFUE? +
Upgrading from an 80% AFUE system saves approximately 16% on heating costs annually. For homes spending $1,500 yearly on heating, expect savings around $240 per year. Payback periods typically range from 5-7 years depending on fuel costs and usage patterns in your region.
Is 16 SEER cooling efficiency competitive for this price point? +
Yes, 16 SEER remains solid mid-range cooling performance without premium two-stage compressor pricing. However, competitors offer 17-18 SEER models at similar costs. The single-stage design limits part-load efficiency, so performance on 70-80 degree days won't match variable-capacity units.
What happens if I don't register the warranty? +
Warranty activation requires online registration. Without it, you forfeit the 10-year coverage and retain only limited manufacturer protection. Register immediately upon installation to preserve full warranty rights and document the purchase date.

Affiliate disclosure: IndustrialRank earns a commission on qualifying purchases at no extra cost to you. We only recommend products we have independently reviewed.